Forming die assembly

Details Forming die assembly Forming die assembly

B - Operations, Transporting

29

C

18/653

B29C 51/42 (2006.01) B29C 51/04 (2006.01) B29C 51/10 (2006.01)

Patent

CA 1306333

FORMING DIE ASSEMBLY ABSTRACT OF THE DISCLOSURE A forming die assembly is disclosed for rapidly forming a foam sheet. The die assembly comprises a lower die body containing at least one cavity. The body has flow passages provided therein for flowing a fluid through the body to cool the die body. The cavity has a plurality of passages intersecting the cavity surface. Conduits are connected to the passages and intersect the die body cavity for withdrawing air from the cavity. An upper die unit includes a frame which is adapted for clamping the foam sheet against the lower die body. A plug is incorporated into the upper die unit and shaped for mating closely within the cavity of the lower die body. The plug contains flow passages therein for flowing a coolant fluid through the plug to cool the plug, whereby a foam sheet passed between the lower die body and the upper die body is deformed downwardly by air withdrawal from the lower die cavity and further formed between the mating body cavity and plug while the sheet is being cooled to below its plastic transition temperature to provide a stable formed shell shape within the foam sheet.

615957

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